Self-generating gas-burner



(No Model.)

H. F. SMITH. SELF GBNERATING GAS BURNER.

Patented' Dec. 17, 1895.

ANPREW EGRAHANLPHUl'U-LITHQWASHINGTGNJL.

NITED STATES .AT-ENT Erice.

HARPER F. SMITH, OF PHILADELPHIA, PENNSYLVANIA.

SELF-GENERATING GASf-BVU RN ER.

SPECIFICATION forming' part 0f Letters Patent N0. 551,656, datedDecember 17, 1895. Application led November 13, 1894. Serial No.528,665. (No model.)

To all whom it may concern.-

Be it known that I, HARPER F. SMITH, a

citizen of the United States, residing in Philadelphia, Pennsylvania,have invented certain Improvements in Self-Generating Gas- Burners, ofwhich the following is a specification. y

My invention relates to that class of burners which use gasoline orother highly-Volatile hydrocarbon as an illuminant, one object of myinvention being to so construct such a burner that while theneedle-valve which regulates the flow of oil or vapor to the burner iswell shielded from drafts or from rain or snow, it is readily accessibleat any time without removing any portion of the burner, a further objectbeing to provide for the effective heating of the burner so as to insurethe proper vaporization of the oil and its transformation into a fixedgas before it issues from the burner. These objects I attain in themanner hereinafter set forth, reference being had to the accompanyingdrawings, in which- Figure l is a vertical sectional view of a burnerconstructed in accordance with my invention. Fig. 2 is a side View ofthe upper portion of the burner. Fig. 3 is a sectional plan view on theline 3 3, Fig. l. Fig. et is a sectional view of a modified form of theburner. Fig. 5 is a similar view of still another form of the same 5 andFig. 6 is a transverse section on the line 6 6, Fig. 5.

The valve-chest a of the burner has at one side a threaded opening b forthe reception of the supply-pipe communicating with an oilreservoir,elevated or otherwise constructed so that the oil will gain access tothe valvechamber under pressure. The valve-chest is provided with avertical needle-valve d and has, at the bottom, a depending stemcarrying a cup f which may receive a supply of ignitable fluid in orderto provide for the preliminary heating of the burner when it is notdesired to ignite the oil directly as it issues from the valve-chest.Inclosing the upper portion of the valve-chest and its valve andextending forward at each side of the valvechest is a hood g, open infront so as to permit ready access to the valve and valve-seat, butinclosing the valve on the remaining three sides, so that the point atwhich the oil issues I from the valve-chest is thoroughly protected fromsnow or rain and also from cross-drafts which would tend to extinguishthe iiame. Hence the burner can be used in exposed situations withoutrisk of accidental extinguishing of theflame. Above the hood g is atubular burner-body h inclosing a superheatingchamber i and having atthe tip a slot o" for the escape of the gas, and on said tip are twopairs of wings m /m/ and n n', one pair on each side of the slot, thesewings being inclined toward each other from bottom to top and the wingsof each pair being separated by a narrow space p. The ame issuingbetween the pairs of wings serves to highly heat both of the wings ofeach pair, this heat being transmitted to the burner-body h so as tosuperheat the vapor in the chamber i, the air which passes through thespaces p between the wings being also highly heated in order that it'may mix with the gas issuing between the upper ends of the pairs ofwings and thus insure the perfect combustion of said gas.

The win gs m m and -n n are flared laterally, as shown in Fig. 2, so asto increase their area and heat-absorbing surface. My invention may,however, be embodied in a burner having but a single pair of wings atone side instead of wings upon both sides, as shown, or the wings may bedispensed with altogether without departing from the main features of myinvention. For instance, in Figs. 4 and 5 I have shown burners in whichthe wings are so dispensed with.

In the construction shown in Fig. i the burner -tube containing thesuperheatingchamber and the hood for shielding the valve are combined inone structure of dome-like character,the lower portion g of thisstructure having in front an opening g2 for permitting access to theValve, and the upper portion h of the structure inclosing thesuperheatingchamber z, the tip s used in this case being similar to anOrdinar gas-tip.

In the construction shown in Fig. 5 the same form of shield for theVvalve is used as in Fig.

IOO

It will be evident, therefore, that various forms of burner-tips may beused without departing from the essential features of my invention,although the form of tip shown in Fig. l is preferred and is made thesubject of a special claim.

In all forms of the burner which I have illustrated, however, the hoodwhich inclosed the needle-valve contains a chamber of large area intowhich the jet of hydrocarbon vapor from the needle-valve is projectedupward, and this chamber communicates through a contracted neck with achamber above and of largelarea than said contracted neck, the latterchamber communicating with the outlet of the burner. The jet of air fromthe needle- Valve crossing the chamber within the hood or shield carrieswith it a certain amount of air, and this combined jet of hydrocarbonVapor and air is projected through the contracted neck above the chamberwithin the shield, so that the air and vapor are intimately mixed inpassing through said contracted neck, and on issuing from the latter arepermitted to expand in the chamber above the neck so as to rapidlyabsorb heat from the walls of said chamber preparatory to cscapinthrough the burner-opcnin g at the top of said expansion-chamber.

Vhile I do not, therefore, claim broadly a burner having a needle-valveshielded on three sides, I claim as my invention and desire to secure byLetters Patentl. A self generating gas burner in which are combined avalve chest having a Valve discharging upwardly, and a protecting domeor hood inclosing said Valve except at one side and containing a chamberin which air can surround the jet issuing from the valve, said hoodhaving at the upper end and above the needle valve a neck contracted inarca as com,- pared with the area of the air inlet, and supporting aburner body containing a chamber of greater area than the neck, whichchamber communicates at its upper end with the outlet opening of theburner tip, substantially as specified.

2. The combination of the slitted burner tube and a pair of wingscarried by said tube and located on one side of the same, both of saidwings bein g inclined in the same direction toward the flame issuingfrom. the burner, the space between the inner wing and the burner tube,a-nd also the space between the two wings being closed at the bott-om,but open at the ends, substantially as specified.

3. The combination of thebiuncrtubc with two pairs of wingscarried bysaid tube, one pair being located on one side of the burner tube andinclined in one direction toward the flame issuing from said tube, andthe other pair being located on the opposite side of the burner tube andinclined in the opposite direction toward the ilame issuing therefrom,the spaces between the inner wings and the burner tip and also thespaces between the wings of each pairbeing closed at the bottom, butopen at the ends, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HARPER l. SMITH.

Witnesses FRANK E. BECHTOLD, JOSEPH II. KLEIN.

